The volume of the liquor amnii.
D000653:Amniotic Fluid; D004395:Dye Dilution Technique; D005260:Female; D005315:Fetal Diseases; D006801:Humans; D011225:Pre-Eclampsia; D011247:Pregnancy; D011248:Pregnancy Complications; D011273:Pregnancy, Prolonged; D014427:Twins